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Please install the modpack via the technic launcher on your client.
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I resolved Roman thanks for the help it was just 1 mod that wasn't inside the modpack where i downloaded it xD
TCG is a mod that pixelmon reforged modpack requires and i didn't have that mod inside the modpack 
Anyway really appreciate your help 
Hi all,
this night i spent about 2 hours setting up a server with this modpack "Pixelmon Reforged 6.1.0" but when i try join the server it keeps rejecting the mod or something like that i will write the exact error below:
"Mod rejections [FMLMod:tcg{1.12.2-2.0.1-universal}]"
After this i tried to check if the version on modpack and forge was correct and it's ok.. i installed correctly Pixelmon reforged 6.1.0 downloaded from the pixelmon official website and installed the 1.12.2-14.23.1.2555 forge version.
What could be the problem? I tried to reinstall the pixelmon like 20 times downloading it from various site and reinstalled all the versions of forge 1.12.2.X.X.X to try out if someone let me log in but nothing..
If u want i can put ,belows the post, the FML log file so u can check where is the problem to try fix this situation cause after 2 hours my mind is completly blowed up ahahah 
(just tell me i will attach at the post the log file )
Thank u in advance
Ferdy.
